Just add to the "cropped senssor" discussion, I have a pratical example:
I took this moon picture last week-end when I got bored at watching television.
I took this picture with a Pentax 6x7 600mmF4 + Vivitar 2X teleconverter on a Pentax K20D, so compared to the image I would have got on a 6x7 film or even 645D this is extremely cropped. However I still cropped the image I got on the camera to put the result above so I had enough sensor surface to capture what I wanted to.
Regardless of the final image quality (city lights didn't help to get the best) the total number of pixel available with my K20D was higher than the amount of pixels I would have got from a FF camera or from a 645D. There a lot to discuss around, but if you manage to get enough resolution from your lens (and I'm sure you can from the likes of DA70, FA77 or DFA100) a croped sensor can give you better results than the bigger sensor
once the image cropped to the resolution you are looking for.
I've seen this argument from sport photographers prefering APSH to FF for that reason, so this is not purelly retorical. Or on another case, if you are hiking on faraway places, you may not be able to carry lenses long enough for the wildlife photography you intend. But a relatively light 100/2.8 would make equivalent to a 600mm... So this NC-1 could be a very companion of an APSC camera in such cases and certainly lighter than the mentionned 600...